Learning nanotechnology through experimentation: Carbon nanotube manufacturing using an electric discharge machine

Abstract

A novel nanotechnology laboratory experiment for a required junior/senior undergraduate engineering course, Engineering of Manufacturing Processes, is described and implemented. The experiment demonstrates a process of manufacturing carbon nanotubes using a method representing a variation on arc discharge. Carbon nanotubes are synthesized in oil by electric discharge machining using two graphite electrodes. The results are compared to a known empirical formula for material removal rate in electric discharge machining. A cost analysis of the process, determining the cost of as produced carbon nanotubes is performed. This 2-h experiment is complemented with a single 2-h lecture on nanotechnology creating a lecture-experiment nanotechnology module. Student learning outcomes for the module are developed, assessed, and analyzed. The results show a signifi cant improvement in students ' knowledge. Student perceptions about nanotechnology, carbon nano tube manufacturing, and the need for life-long learning are assessed. Pedagogical justifi cations and sustainability of the nanotechnology lecture-experiment module within an undergraduate engineering curriculum are addressed.